4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License as published
10 * by the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU Lesser General Public License for more details.
23 #include <linux/in6.h>
24 #include <linux/slab.h>
25 #include <linux/mempool.h>
26 #include <linux/workqueue.h>
27 #include "cifs_fs_sb.h"
29 #include <crypto/internal/hash.h>
30 #include <linux/scatterlist.h>
31 #ifdef CONFIG_CIFS_SMB2
35 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
38 * The sizes of various internal tables and strings
40 #define MAX_UID_INFO 16
41 #define MAX_SES_INFO 2
42 #define MAX_TCON_INFO 4
44 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
45 #define MAX_SERVER_SIZE 15
46 #define MAX_SHARE_SIZE 80
47 #define CIFS_MAX_DOMAINNAME_LEN 256 /* max domain name length */
48 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
49 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
51 #define CIFS_MIN_RCV_POOL 4
53 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
55 * default attribute cache timeout (jiffies)
57 #define CIFS_DEF_ACTIMEO (1 * HZ)
60 * max attribute cache timeout (jiffies) - 2^30
62 #define CIFS_MAX_ACTIMEO (1 << 30)
65 * MAX_REQ is the maximum number of requests that WE will send
66 * on one socket concurrently.
68 #define CIFS_MAX_REQ 32767
70 #define RFC1001_NAME_LEN 15
71 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
73 /* currently length of NIP6_FMT */
74 #define SERVER_NAME_LENGTH 40
75 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
77 /* SMB echo "timeout" -- FIXME: tunable? */
78 #define SMB_ECHO_INTERVAL (60 * HZ)
82 #ifndef XATTR_DOS_ATTRIB
83 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
87 * CIFS vfs client Status information (based on what we know.)
90 /* associated with each tcp and smb session */
100 LANMAN = 0, /* Legacy LANMAN auth */
101 NTLM, /* Legacy NTLM012 auth with NTLM hash */
102 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
103 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
104 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
105 Kerberos, /* Kerberos via SPNEGO */
111 /* Netbios frames protocol not supported at this time */
119 /* crypto security descriptor definition */
121 struct shash_desc shash;
125 /* crypto hashing related structure/fields, not specific to a sec mech */
126 struct cifs_secmech {
127 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
128 struct crypto_shash *md5; /* md5 hash function */
129 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
130 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
131 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
132 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
135 /* per smb session structure/fields */
136 struct ntlmssp_auth {
137 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
138 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
139 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
140 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
148 struct cifs_sid osid;
149 struct cifs_sid gsid;
150 struct cifs_ntace *ntaces;
151 struct cifs_ace *aces;
155 *****************************************************************
156 * Except the CIFS PDUs themselves all the
157 * globally interesting structs should go here
158 *****************************************************************
162 * A smb_rqst represents a complete request to be issued to a server. It's
163 * formed by a kvec array, followed by an array of pages. Page data is assumed
164 * to start at the beginning of the first page.
167 struct kvec *rq_iov; /* array of kvecs */
168 unsigned int rq_nvec; /* number of kvecs in array */
169 struct page **rq_pages; /* pointer to array of page ptrs */
170 unsigned int rq_npages; /* number pages in array */
171 unsigned int rq_pagesz; /* page size to use */
172 unsigned int rq_tailsz; /* length of last page */
183 struct TCP_Server_Info;
187 struct dfs_info3_param;
191 struct cifs_readdata;
192 struct cifs_writedata;
193 struct cifs_io_parms;
194 struct cifs_search_info;
195 struct cifsInodeInfo;
197 struct smb_version_operations {
198 int (*send_cancel)(struct TCP_Server_Info *, void *,
199 struct mid_q_entry *);
200 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
201 /* setup request: allocate mid, sign message */
202 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
204 /* setup async request: allocate mid, sign message */
205 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
207 /* check response: verify signature, map error */
208 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
210 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
212 void (*set_credits)(struct TCP_Server_Info *, const int);
213 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
214 unsigned int (*get_credits)(struct mid_q_entry *);
215 __u64 (*get_next_mid)(struct TCP_Server_Info *);
216 /* data offset from read response message */
217 unsigned int (*read_data_offset)(char *);
218 /* data length from read response message */
219 unsigned int (*read_data_length)(char *);
220 /* map smb to linux error */
221 int (*map_error)(char *, bool);
222 /* find mid corresponding to the response message */
223 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
224 void (*dump_detail)(void *);
225 void (*clear_stats)(struct cifs_tcon *);
226 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
227 /* verify the message */
228 int (*check_message)(char *, unsigned int);
229 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
230 /* process transaction2 response */
231 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
233 /* check if we need to negotiate */
234 bool (*need_neg)(struct TCP_Server_Info *);
235 /* negotiate to the server */
236 int (*negotiate)(const unsigned int, struct cifs_ses *);
237 /* set negotiated write size */
238 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
239 /* set negotiated read size */
240 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
241 /* setup smb sessionn */
242 int (*sess_setup)(const unsigned int, struct cifs_ses *,
243 const struct nls_table *);
244 /* close smb session */
245 int (*logoff)(const unsigned int, struct cifs_ses *);
246 /* connect to a server share */
247 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
248 struct cifs_tcon *, const struct nls_table *);
249 /* close tree connecion */
250 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
251 /* get DFS referrals */
252 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
253 const char *, struct dfs_info3_param **,
254 unsigned int *, const struct nls_table *, int);
255 /* informational QFS call */
256 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
257 /* check if a path is accessible or not */
258 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
259 struct cifs_sb_info *, const char *);
260 /* query path data from the server */
261 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
262 struct cifs_sb_info *, const char *,
263 FILE_ALL_INFO *, bool *);
264 /* query file data from the server */
265 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
266 struct cifs_fid *, FILE_ALL_INFO *);
267 /* get server index number */
268 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
269 struct cifs_sb_info *, const char *,
270 u64 *uniqueid, FILE_ALL_INFO *);
271 /* set size by path */
272 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
273 const char *, __u64, struct cifs_sb_info *, bool);
274 /* set size by file handle */
275 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
276 struct cifsFileInfo *, __u64, bool);
278 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
280 /* check if we can send an echo or nor */
281 bool (*can_echo)(struct TCP_Server_Info *);
282 /* send echo request */
283 int (*echo)(struct TCP_Server_Info *);
284 /* create directory */
285 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
286 struct cifs_sb_info *);
287 /* set info on created directory */
288 void (*mkdir_setinfo)(struct inode *, const char *,
289 struct cifs_sb_info *, struct cifs_tcon *,
291 /* remove directory */
292 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
293 struct cifs_sb_info *);
295 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
296 struct cifs_sb_info *);
297 /* open, rename and delete file */
298 int (*rename_pending_delete)(const char *, struct dentry *,
300 /* send rename request */
301 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
302 const char *, struct cifs_sb_info *);
303 /* send create hardlink request */
304 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
305 const char *, const char *,
306 struct cifs_sb_info *);
307 /* open a file for non-posix mounts */
308 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
309 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
310 struct cifs_sb_info *);
311 /* set fid protocol-specific info */
312 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
314 void (*close)(const unsigned int, struct cifs_tcon *,
316 /* send a flush request to the server */
317 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
318 /* async read from the server */
319 int (*async_readv)(struct cifs_readdata *);
320 /* async write to the server */
321 int (*async_writev)(struct cifs_writedata *);
322 /* sync read from the server */
323 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
324 struct cifs_io_parms *, unsigned int *, char **,
326 /* sync write to the server */
327 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
328 struct cifs_io_parms *, unsigned int *, struct kvec *,
330 /* open dir, start readdir */
331 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
332 const char *, struct cifs_sb_info *,
333 struct cifs_fid *, __u16,
334 struct cifs_search_info *);
335 /* continue readdir */
336 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
338 __u16, struct cifs_search_info *srch_inf);
340 int (*close_dir)(const unsigned int, struct cifs_tcon *,
342 /* calculate a size of SMB message */
343 unsigned int (*calc_smb_size)(void *);
344 /* check for STATUS_PENDING and process it in a positive case */
345 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
346 /* send oplock break response */
347 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
348 struct cifsInodeInfo *);
349 /* query remote filesystem */
350 int (*queryfs)(const unsigned int, struct cifs_tcon *,
352 /* send mandatory brlock to the server */
353 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
354 __u64, __u32, int, int, bool);
355 /* unlock range of mandatory locks */
356 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
358 /* push brlocks from the cache to the server */
359 int (*push_mand_locks)(struct cifsFileInfo *);
360 /* get lease key of the inode */
361 void (*get_lease_key)(struct inode *, struct cifs_fid *fid);
362 /* set lease key of the inode */
363 void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
364 /* generate new lease key */
365 void (*new_lease_key)(struct cifs_fid *fid);
366 int (*calc_signature)(struct smb_rqst *rqst,
367 struct TCP_Server_Info *server);
368 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
369 const unsigned char *, const unsigned char *, char *,
370 size_t, const struct nls_table *, int);
371 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
372 const char *, const void *, const __u16,
373 const struct nls_table *, int);
374 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
375 const char *, u32 *);
376 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
380 struct smb_version_values {
381 char *version_string;
383 __u32 req_capabilities;
384 __u32 large_lock_type;
385 __u32 exclusive_lock_type;
386 __u32 shared_lock_type;
387 __u32 unlock_lock_type;
389 size_t max_header_size;
390 size_t read_rsp_size;
392 unsigned int cap_unix;
393 unsigned int cap_nt_find;
394 unsigned int cap_large_files;
395 unsigned int oplock_read;
398 #define HEADER_SIZE(server) (server->vals->header_size)
399 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
406 char *iocharset; /* local code page for mapping to and from Unicode */
407 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
408 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
424 bool no_psx_acl:1; /* set if posix acl support should be disabled */
426 bool backupuid_specified; /* mount option backupuid is specified */
427 bool backupgid_specified; /* mount option backupgid is specified */
428 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
429 bool server_ino:1; /* use inode numbers from server ie UniqueId */
431 bool strict_io:1; /* strict cache behavior */
432 bool remap:1; /* set to remap seven reserved chars in filenames */
433 bool posix_paths:1; /* unset to not ask for posix pathnames. */
436 bool nullauth:1; /* attempt to authenticate with null user */
437 bool nocase:1; /* request case insensitive filenames */
438 bool nobrl:1; /* disable sending byte range locks to srv */
439 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
440 bool seal:1; /* request transport encryption on share */
441 bool nodfs:1; /* Do not request DFS, even if available */
442 bool local_lease:1; /* check leases only on local system, not remote */
445 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
446 bool fsc:1; /* enable fscache */
447 bool mfsymlinks:1; /* use Minshall+French Symlinks */
449 bool rwpidforward:1; /* pid forward for read/write operations */
452 bool sockopt_tcp_nodelay:1;
453 unsigned long actimeo; /* attribute cache timeout (jiffies) */
454 struct smb_version_operations *ops;
455 struct smb_version_values *vals;
457 struct sockaddr_storage dstaddr; /* destination address */
458 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
459 struct nls_table *local_nls;
462 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
463 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
464 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
465 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
466 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
467 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
468 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
469 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
470 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
471 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
473 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
474 MS_NODEV | MS_SYNCHRONOUS)
476 struct cifs_mnt_data {
477 struct cifs_sb_info *cifs_sb;
482 static inline unsigned int
483 get_rfc1002_length(void *buf)
485 return be32_to_cpu(*((__be32 *)buf));
489 inc_rfc1001_len(void *buf, int count)
491 be32_add_cpu((__be32 *)buf, count);
494 struct TCP_Server_Info {
495 struct list_head tcp_ses_list;
496 struct list_head smb_ses_list;
497 int srv_count; /* reference counter */
498 /* 15 character server name + 0x20 16th byte indicating type = srv */
499 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
500 struct smb_version_operations *ops;
501 struct smb_version_values *vals;
502 enum statusEnum tcpStatus; /* what we think the status is */
503 char *hostname; /* hostname portion of UNC string */
504 struct socket *ssocket;
505 struct sockaddr_storage dstaddr;
506 struct sockaddr_storage srcaddr; /* locally bind to this IP */
510 wait_queue_head_t response_q;
511 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
512 struct list_head pending_mid_q;
513 bool noblocksnd; /* use blocking sendmsg */
514 bool noautotune; /* do not autotune send buf sizes */
516 int credits; /* send no more requests at once */
517 unsigned int in_flight; /* number of requests on the wire to server */
518 spinlock_t req_lock; /* protect the two values above */
519 struct mutex srv_mutex;
520 struct task_struct *tsk;
521 char server_GUID[16];
523 bool session_estab; /* mark when very first sess is established */
524 #ifdef CONFIG_CIFS_SMB2
525 int echo_credits; /* echo reserved slots */
526 int oplock_credits; /* oplock break reserved slots */
527 bool echoes:1; /* enable echoes */
529 u16 dialect; /* dialect index that server chose */
530 enum securityEnum secType;
531 bool oplocks:1; /* enable oplocks */
532 unsigned int maxReq; /* Clients should submit no more */
533 /* than maxReq distinct unanswered SMBs to the server when using */
534 /* multiplexed reads or writes */
535 unsigned int maxBuf; /* maxBuf specifies the maximum */
536 /* message size the server can send or receive for non-raw SMBs */
537 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
538 /* when socket is setup (and during reconnect) before NegProt sent */
539 unsigned int max_rw; /* maxRw specifies the maximum */
540 /* message size the server can send or receive for */
541 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
542 unsigned int max_vcs; /* maximum number of smb sessions, at least
543 those that can be specified uniquely with
545 unsigned int capabilities; /* selective disabling of caps by smb sess */
546 int timeAdj; /* Adjust for difference in server time zone in sec */
547 __u64 CurrentMid; /* multiplex id - rotating counter */
548 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
549 /* 16th byte of RFC1001 workstation name is always null */
550 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
551 __u32 sequence_number; /* for signing, protected by srv_mutex */
552 struct session_key session_key;
553 unsigned long lstrp; /* when we got last response from this server */
554 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
555 /* extended security flavors that server supports */
556 bool sec_ntlmssp; /* supports NTLMSSP */
557 bool sec_kerberosu2u; /* supports U2U Kerberos */
558 bool sec_kerberos; /* supports plain Kerberos */
559 bool sec_mskerberos; /* supports legacy MS Kerberos */
560 bool large_buf; /* is current buffer large? */
561 struct delayed_work echo; /* echo ping workqueue job */
562 struct kvec *iov; /* reusable kvec array for receives */
563 unsigned int nr_iov; /* number of kvecs in array */
564 char *smallbuf; /* pointer to current "small" buffer */
565 char *bigbuf; /* pointer to current "big" buffer */
566 unsigned int total_read; /* total amount of data read in this pass */
567 #ifdef CONFIG_CIFS_FSCACHE
568 struct fscache_cookie *fscache; /* client index cache cookie */
570 #ifdef CONFIG_CIFS_STATS2
571 atomic_t in_send; /* requests trying to send */
572 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
574 #ifdef CONFIG_CIFS_SMB2
575 unsigned int max_read;
576 unsigned int max_write;
577 #endif /* CONFIG_CIFS_SMB2 */
580 static inline unsigned int
581 in_flight(struct TCP_Server_Info *server)
584 spin_lock(&server->req_lock);
585 num = server->in_flight;
586 spin_unlock(&server->req_lock);
591 has_credits(struct TCP_Server_Info *server, int *credits)
594 spin_lock(&server->req_lock);
596 spin_unlock(&server->req_lock);
601 add_credits(struct TCP_Server_Info *server, const unsigned int add,
604 server->ops->add_credits(server, add, optype);
608 set_credits(struct TCP_Server_Info *server, const int val)
610 server->ops->set_credits(server, val);
614 get_next_mid(struct TCP_Server_Info *server)
616 return server->ops->get_next_mid(server);
620 * When the server supports very large reads and writes via POSIX extensions,
621 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
622 * including the RFC1001 length.
624 * Note that this might make for "interesting" allocation problems during
625 * writeback however as we have to allocate an array of pointers for the
626 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
628 * For reads, there is a similar problem as we need to allocate an array
629 * of kvecs to handle the receive, though that should only need to be done
632 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
633 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
636 * When the server doesn't allow large posix writes, only allow a rsize/wsize
637 * of 2^17-1 minus the size of the call header. That allows for a read or
638 * write up to the maximum size described by RFC1002.
640 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
641 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
644 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
645 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
646 * a single wsize request with a single call.
648 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
651 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
652 * those values when posix extensions aren't in force. In actuality here, we
653 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
654 * to be ok with the extra byte even though Windows doesn't send writes that
659 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
661 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
662 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
665 * Macros to allow the TCP_Server_Info->net field and related code to drop out
666 * when CONFIG_NET_NS isn't set.
671 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
676 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
683 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
688 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
695 * Session structure. One of these for each uid session with a particular host
698 struct list_head smb_ses_list;
699 struct list_head tcon_list;
700 struct mutex session_mutex;
701 struct TCP_Server_Info *server; /* pointer to server info */
702 int ses_count; /* reference counter */
703 enum statusEnum status;
704 unsigned overrideSecFlg; /* if non-zero override global sec flags */
705 __u16 ipc_tid; /* special tid for connection to IPC share */
708 char *serverOS; /* name of operating system underlying server */
709 char *serverNOS; /* name of network operating system of server */
710 char *serverDomain; /* security realm of server */
711 __u64 Suid; /* remote smb uid */
712 kuid_t linux_uid; /* overriding owner of files on the mount */
713 kuid_t cred_uid; /* owner of credentials */
714 unsigned int capabilities;
715 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
716 TCP names - will ipv6 and sctp addresses fit? */
717 char *user_name; /* must not be null except during init of sess
718 and after mount option parsing we fill it */
721 struct session_key auth_key;
722 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
723 bool need_reconnect:1; /* connection reset, uid now invalid */
724 #ifdef CONFIG_CIFS_SMB2
726 #endif /* CONFIG_CIFS_SMB2 */
729 /* no more than one of the following three session flags may be set */
730 #define CIFS_SES_NT4 1
731 #define CIFS_SES_OS2 2
732 #define CIFS_SES_W9X 4
733 /* following flag is set for old servers such as OS2 (and Win95?)
734 which do not negotiate NTLM or POSIX dialects, but instead
735 negotiate one of the older LANMAN dialects */
736 #define CIFS_SES_LANMAN 8
739 cap_unix(struct cifs_ses *ses)
741 return ses->server->vals->cap_unix & ses->capabilities;
745 * there is one of these for each connection to a resource on a particular
749 struct list_head tcon_list;
751 struct list_head openFileList;
752 struct cifs_ses *ses; /* pointer to session associated with */
753 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
754 char *nativeFileSystem;
755 char *password; /* for share-level security */
756 __u32 tid; /* The 4 byte tree id */
757 __u16 Flags; /* optional support bits */
758 enum statusEnum tidStatus;
759 #ifdef CONFIG_CIFS_STATS
760 atomic_t num_smbs_sent;
765 atomic_t num_flushes;
766 atomic_t num_oplock_brks;
769 atomic_t num_deletes;
771 atomic_t num_posixopens;
772 atomic_t num_posixmkdirs;
774 atomic_t num_renames;
775 atomic_t num_t2renames;
779 atomic_t num_hardlinks;
780 atomic_t num_symlinks;
782 atomic_t num_acl_get;
783 atomic_t num_acl_set;
785 #ifdef CONFIG_CIFS_SMB2
787 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
788 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
790 #endif /* CONFIG_CIFS_SMB2 */
792 #ifdef CONFIG_CIFS_STATS2
793 unsigned long long time_writes;
794 unsigned long long time_reads;
795 unsigned long long time_opens;
796 unsigned long long time_deletes;
797 unsigned long long time_closes;
798 unsigned long long time_mkdirs;
799 unsigned long long time_rmdirs;
800 unsigned long long time_renames;
801 unsigned long long time_t2renames;
802 unsigned long long time_ffirst;
803 unsigned long long time_fnext;
804 unsigned long long time_fclose;
805 #endif /* CONFIG_CIFS_STATS2 */
808 spinlock_t stat_lock;
809 #endif /* CONFIG_CIFS_STATS */
810 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
811 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
812 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
813 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
816 bool seal:1; /* transport encryption for this mounted share */
817 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
818 for this mount even if server would support */
819 bool local_lease:1; /* check leases (only) on local system not remote */
820 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
821 bool need_reconnect:1; /* connection reset, tid now invalid */
822 #ifdef CONFIG_CIFS_SMB2
823 bool print:1; /* set if connection to printer share */
824 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
827 __u32 maximal_access;
828 __u32 vol_serial_number;
829 __le64 vol_create_time;
830 #endif /* CONFIG_CIFS_SMB2 */
831 #ifdef CONFIG_CIFS_FSCACHE
832 u64 resource_id; /* server resource id */
833 struct fscache_cookie *fscache; /* cookie for share */
835 struct list_head pending_opens; /* list of incomplete opens */
836 /* BB add field for back pointer to sb struct(s)? */
840 * This is a refcounted and timestamped container for a tcon pointer. The
841 * container holds a tcon reference. It is considered safe to free one of
842 * these when the tl_count goes to 0. The tl_time is the time of the last
843 * "get" on the container.
846 struct rb_node tl_rbnode;
848 unsigned long tl_flags;
849 #define TCON_LINK_MASTER 0
850 #define TCON_LINK_PENDING 1
851 #define TCON_LINK_IN_TREE 2
852 unsigned long tl_time;
854 struct cifs_tcon *tl_tcon;
857 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
859 static inline struct cifs_tcon *
860 tlink_tcon(struct tcon_link *tlink)
862 return tlink->tl_tcon;
865 extern void cifs_put_tlink(struct tcon_link *tlink);
867 static inline struct tcon_link *
868 cifs_get_tlink(struct tcon_link *tlink)
870 if (tlink && !IS_ERR(tlink))
871 atomic_inc(&tlink->tl_count);
875 /* This function is always expected to succeed */
876 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
878 #define CIFS_OPLOCK_NO_CHANGE 0xfe
880 struct cifs_pending_open {
881 struct list_head olist;
882 struct tcon_link *tlink;
888 * This info hangs off the cifsFileInfo structure, pointed to by llist.
889 * This is used to track byte stream locks on the file
891 struct cifsLockInfo {
892 struct list_head llist; /* pointer to next cifsLockInfo */
893 struct list_head blist; /* pointer to locks blocked on this */
894 wait_queue_head_t block_q;
902 * One of these for each open instance of a file
904 struct cifs_search_info {
905 loff_t index_of_last_entry;
906 __u16 entries_in_buffer;
909 char *ntwrk_buf_start;
910 char *srch_entries_start;
912 const char *presume_name;
913 unsigned int resume_name_len;
917 bool smallBuf:1; /* so we know which buf_release function to call */
922 #ifdef CONFIG_CIFS_SMB2
923 __u64 persistent_fid; /* persist file id for smb2 */
924 __u64 volatile_fid; /* volatile file id for smb2 */
925 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
927 struct cifs_pending_open *pending_open;
930 struct cifs_fid_locks {
931 struct list_head llist;
932 struct cifsFileInfo *cfile; /* fid that owns locks */
933 struct list_head locks; /* locks held by fid above */
936 struct cifsFileInfo {
937 struct list_head tlist; /* pointer to next fid owned by tcon */
938 struct list_head flist; /* next fid (file instance) for this inode */
939 struct cifs_fid_locks *llist; /* brlocks held by this fid */
940 kuid_t uid; /* allows finding which FileInfo structure */
941 __u32 pid; /* process id who opened file */
942 struct cifs_fid fid; /* file id from remote */
943 /* BB add lock scope info here if needed */ ;
944 /* lock scope id (0 if none) */
945 struct dentry *dentry;
946 unsigned int f_flags;
947 struct tcon_link *tlink;
948 bool invalidHandle:1; /* file closed via session abend */
949 bool oplock_break_cancelled:1;
950 int count; /* refcount protected by cifs_file_list_lock */
951 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
952 struct cifs_search_info srch_inf;
953 struct work_struct oplock_break; /* work for oplock breaks */
956 struct cifs_io_parms {
958 #ifdef CONFIG_CIFS_SMB2
959 __u64 persistent_fid; /* persist file id for smb2 */
960 __u64 volatile_fid; /* volatile file id for smb2 */
965 struct cifs_tcon *tcon;
968 struct cifs_readdata;
970 /* asynchronous read support */
971 struct cifs_readdata {
972 struct kref refcount;
973 struct list_head list;
974 struct completion done;
975 struct cifsFileInfo *cfile;
976 struct address_space *mapping;
981 struct work_struct work;
982 int (*read_into_pages)(struct TCP_Server_Info *server,
983 struct cifs_readdata *rdata,
988 unsigned int nr_pages;
989 struct page *pages[];
992 struct cifs_writedata;
994 /* asynchronous write support */
995 struct cifs_writedata {
996 struct kref refcount;
997 struct list_head list;
998 struct completion done;
999 enum writeback_sync_modes sync_mode;
1000 struct work_struct work;
1001 struct cifsFileInfo *cfile;
1006 unsigned int pagesz;
1007 unsigned int tailsz;
1008 unsigned int nr_pages;
1009 struct page *pages[1];
1013 * Take a reference on the file private data. Must be called with
1014 * cifs_file_list_lock held.
1017 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1022 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1023 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1026 * One of these for each file inode
1029 struct cifsInodeInfo {
1030 bool can_cache_brlcks;
1031 struct list_head llist; /* locks helb by this inode */
1032 struct rw_semaphore lock_sem; /* protect the fields above */
1033 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1034 struct list_head openFileList;
1035 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1036 bool clientCanCacheRead; /* read oplock */
1037 bool clientCanCacheAll; /* read and writebehind oplock */
1038 bool delete_pending; /* DELETE_ON_CLOSE is set */
1039 bool invalid_mapping; /* pagecache is invalid */
1040 unsigned long time; /* jiffies of last update of inode */
1041 u64 server_eof; /* current file size on server -- protected by i_lock */
1042 u64 uniqueid; /* server inode number */
1043 u64 createtime; /* creation time on server */
1044 #ifdef CONFIG_CIFS_SMB2
1045 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1047 #ifdef CONFIG_CIFS_FSCACHE
1048 struct fscache_cookie *fscache;
1050 struct inode vfs_inode;
1053 static inline struct cifsInodeInfo *
1054 CIFS_I(struct inode *inode)
1056 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1059 static inline struct cifs_sb_info *
1060 CIFS_SB(struct super_block *sb)
1062 return sb->s_fs_info;
1065 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1067 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1074 convert_delimiter(char *path, char delim)
1076 char old_delim, *pos;
1084 while ((pos = strchr(pos, old_delim)))
1088 #ifdef CONFIG_CIFS_STATS
1089 #define cifs_stats_inc atomic_inc
1091 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1095 spin_lock(&tcon->stat_lock);
1096 tcon->bytes_written += bytes;
1097 spin_unlock(&tcon->stat_lock);
1101 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1104 spin_lock(&tcon->stat_lock);
1105 tcon->bytes_read += bytes;
1106 spin_unlock(&tcon->stat_lock);
1110 #define cifs_stats_inc(field) do {} while (0)
1111 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1112 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1118 * This is the prototype for the mid receive function. This function is for
1119 * receiving the rest of the SMB frame, starting with the WordCount (which is
1120 * just after the MID in struct smb_hdr). Note:
1122 * - This will be called by cifsd, with no locks held.
1123 * - The mid will still be on the pending_mid_q.
1124 * - mid->resp_buf will point to the current buffer.
1126 * Returns zero on a successful receive, or an error. The receive state in
1127 * the TCP_Server_Info will also be updated.
1129 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1130 struct mid_q_entry *mid);
1133 * This is the prototype for the mid callback function. This is called once the
1134 * mid has been received off of the socket. When creating one, take special
1135 * care to avoid deadlocks. Things to bear in mind:
1137 * - it will be called by cifsd, with no locks held
1138 * - the mid will be removed from any lists
1140 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1142 /* one of these for every pending CIFS request to the server */
1143 struct mid_q_entry {
1144 struct list_head qhead; /* mids waiting on reply from this server */
1145 struct TCP_Server_Info *server; /* server corresponding to this mid */
1146 __u64 mid; /* multiplex id */
1147 __u32 pid; /* process id */
1148 __u32 sequence_number; /* for CIFS signing */
1149 unsigned long when_alloc; /* when mid was created */
1150 #ifdef CONFIG_CIFS_STATS2
1151 unsigned long when_sent; /* time when smb send finished */
1152 unsigned long when_received; /* when demux complete (taken off wire) */
1154 mid_receive_t *receive; /* call receive callback */
1155 mid_callback_t *callback; /* call completion callback */
1156 void *callback_data; /* general purpose pointer for callback */
1157 void *resp_buf; /* pointer to received SMB header */
1158 int mid_state; /* wish this were enum but can not pass to wait_event */
1159 __le16 command; /* smb command code */
1160 bool large_buf:1; /* if valid response, is pointer to large buf */
1161 bool multiRsp:1; /* multiple trans2 responses for one request */
1162 bool multiEnd:1; /* both received */
1165 /* Make code in transport.c a little cleaner by moving
1166 update of optional stats into function below */
1167 #ifdef CONFIG_CIFS_STATS2
1169 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1171 atomic_inc(&server->in_send);
1174 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1176 atomic_dec(&server->in_send);
1179 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1181 atomic_inc(&server->num_waiters);
1184 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1186 atomic_dec(&server->num_waiters);
1189 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1191 mid->when_sent = jiffies;
1194 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1197 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1201 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1205 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1209 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1214 /* for pending dnotify requests */
1215 struct dir_notify_req {
1216 struct list_head lhead;
1223 __u32 filter; /* CompletionFilter (for multishot) */
1228 struct dfs_info3_param {
1229 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1238 * common struct for holding inode info when searching for or updating an
1239 * inode with new info
1242 #define CIFS_FATTR_DFS_REFERRAL 0x1
1243 #define CIFS_FATTR_DELETE_PENDING 0x2
1244 #define CIFS_FATTR_NEED_REVAL 0x4
1245 #define CIFS_FATTR_INO_COLLISION 0x8
1258 unsigned int cf_nlink;
1259 unsigned int cf_dtype;
1260 struct timespec cf_atime;
1261 struct timespec cf_mtime;
1262 struct timespec cf_ctime;
1265 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1268 kfree(param->path_name);
1269 kfree(param->node_name);
1274 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1275 int number_of_items)
1278 if ((number_of_items == 0) || (param == NULL))
1280 for (i = 0; i < number_of_items; i++) {
1281 kfree(param[i].path_name);
1282 kfree(param[i].node_name);
1288 #define MID_REQUEST_ALLOCATED 1
1289 #define MID_REQUEST_SUBMITTED 2
1290 #define MID_RESPONSE_RECEIVED 4
1291 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1292 #define MID_RESPONSE_MALFORMED 0x10
1293 #define MID_SHUTDOWN 0x20
1295 /* Types of response buffer returned from SendReceive2 */
1296 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1297 #define CIFS_SMALL_BUFFER 1
1298 #define CIFS_LARGE_BUFFER 2
1299 #define CIFS_IOVEC 4 /* array of response buffers */
1301 /* Type of Request to SendReceive2 */
1302 #define CIFS_BLOCKING_OP 1 /* operation can block */
1303 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1304 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1305 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1306 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1307 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1309 /* Type of request operation */
1310 #define CIFS_ECHO_OP 0x080 /* echo request */
1311 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1312 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1313 #define CIFS_OP_MASK 0x0380 /* mask request type */
1315 /* Security Flags: indicate type of session setup needed */
1316 #define CIFSSEC_MAY_SIGN 0x00001
1317 #define CIFSSEC_MAY_NTLM 0x00002
1318 #define CIFSSEC_MAY_NTLMV2 0x00004
1319 #define CIFSSEC_MAY_KRB5 0x00008
1320 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1321 #define CIFSSEC_MAY_LANMAN 0x00010
1322 #define CIFSSEC_MAY_PLNTXT 0x00020
1324 #define CIFSSEC_MAY_LANMAN 0
1325 #define CIFSSEC_MAY_PLNTXT 0
1326 #endif /* weak passwords */
1327 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1328 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1330 #define CIFSSEC_MUST_SIGN 0x01001
1331 /* note that only one of the following can be set so the
1332 result of setting MUST flags more than once will be to
1333 require use of the stronger protocol */
1334 #define CIFSSEC_MUST_NTLM 0x02002
1335 #define CIFSSEC_MUST_NTLMV2 0x04004
1336 #define CIFSSEC_MUST_KRB5 0x08008
1337 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1338 #define CIFSSEC_MUST_LANMAN 0x10010
1339 #define CIFSSEC_MUST_PLNTXT 0x20020
1340 #ifdef CONFIG_CIFS_UPCALL
1341 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1343 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1345 #else /* do not allow weak pw hash */
1346 #define CIFSSEC_MUST_LANMAN 0
1347 #define CIFSSEC_MUST_PLNTXT 0
1348 #ifdef CONFIG_CIFS_UPCALL
1349 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1351 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1353 #endif /* WEAK_PW_HASH */
1354 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1355 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1357 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP)
1358 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1359 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1361 *****************************************************************
1362 * All constants go here
1363 *****************************************************************
1366 #define UID_HASH (16)
1369 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1370 * following to be declared.
1373 /****************************************************************************
1374 * Locking notes. All updates to global variables and lists should be
1375 * protected by spinlocks or semaphores.
1379 * GlobalMid_Lock protects:
1380 * list operations on pending_mid_q and oplockQ
1381 * updates to XID counters, multiplex id and SMB sequence numbers
1382 * cifs_file_list_lock protects:
1383 * list operations on tcp and SMB session lists and tCon lists
1384 * f_owner.lock protects certain per file struct operations
1385 * mapping->page_lock protects certain per page operations
1389 * sesSem operations on smb session
1390 * tconSem operations on tree connection
1391 * fh_sem file handle reconnection operations
1393 ****************************************************************************/
1395 #ifdef DECLARE_GLOBALS_HERE
1396 #define GLOBAL_EXTERN
1398 #define GLOBAL_EXTERN extern
1402 * the list of TCP_Server_Info structures, ie each of the sockets
1403 * connecting our client to a distinct server (ip address), is
1404 * chained together by cifs_tcp_ses_list. The list of all our SMB
1405 * sessions (and from that the tree connections) can be found
1406 * by iterating over cifs_tcp_ses_list
1408 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1411 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1412 * tcp session, and the list of tcon's per smb session. It also protects
1413 * the reference counters for the server, smb session, and tcon. Finally,
1414 * changes to the tcon->tidStatus should be done while holding this lock.
1416 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1419 * This lock protects the cifs_file->llist and cifs_file->flist
1420 * list operations, and updates to some flags (cifs_file->invalidHandle)
1421 * It will be moved to either use the tcon->stat_lock or equivalent later.
1422 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1423 * the cifs_tcp_ses_lock must be grabbed first and released last.
1425 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1427 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1428 /* Outstanding dir notify requests */
1429 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1430 /* DirNotify response queue */
1431 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1432 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1435 * Global transaction id (XID) information
1437 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1438 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1439 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1440 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1441 /* on midQ entries */
1443 * Global counters, updated atomically
1445 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1446 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1447 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1448 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1449 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1451 /* Various Debug counters */
1452 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1453 #ifdef CONFIG_CIFS_STATS2
1454 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1455 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1457 GLOBAL_EXTERN atomic_t smBufAllocCount;
1458 GLOBAL_EXTERN atomic_t midCount;
1461 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1462 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1463 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1464 with more secure ntlmssp2 challenge/resp */
1465 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1466 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1467 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1468 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1469 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1470 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1472 #ifdef CONFIG_CIFS_ACL
1473 GLOBAL_EXTERN struct rb_root uidtree;
1474 GLOBAL_EXTERN struct rb_root gidtree;
1475 GLOBAL_EXTERN spinlock_t siduidlock;
1476 GLOBAL_EXTERN spinlock_t sidgidlock;
1477 GLOBAL_EXTERN struct rb_root siduidtree;
1478 GLOBAL_EXTERN struct rb_root sidgidtree;
1479 GLOBAL_EXTERN spinlock_t uidsidlock;
1480 GLOBAL_EXTERN spinlock_t gidsidlock;
1481 #endif /* CONFIG_CIFS_ACL */
1483 void cifs_oplock_break(struct work_struct *work);
1485 extern const struct slow_work_ops cifs_oplock_break_ops;
1486 extern struct workqueue_struct *cifsiod_wq;
1488 extern mempool_t *cifs_mid_poolp;
1490 /* Operations for different SMB versions */
1491 #define SMB1_VERSION_STRING "1.0"
1492 extern struct smb_version_operations smb1_operations;
1493 extern struct smb_version_values smb1_values;
1494 #define SMB20_VERSION_STRING "2.0"
1495 /*extern struct smb_version_operations smb20_operations; */ /* not needed yet */
1496 extern struct smb_version_values smb20_values;
1497 #define SMB21_VERSION_STRING "2.1"
1498 extern struct smb_version_operations smb21_operations;
1499 extern struct smb_version_values smb21_values;
1500 #define SMB30_VERSION_STRING "3.0"
1501 extern struct smb_version_operations smb30_operations;
1502 extern struct smb_version_values smb30_values;
1503 #endif /* _CIFS_GLOB_H */